IPv6 is coming. It is coming sooner than you expect. Knowing the basics of IPv6, how to configure it and basic IPv6 trouble shooting tools will be an important set of tools in you Sysadmin toolbox. Equally important are understanding the issues and pitfalls of integrating IPv6 with your site. These include issues with the various IPv4/IPv6 client/server combinations, geolocation and Carrier Grade Nat (CGN).